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• W2796664329 abstract "The exploration of emerging host organisms for the economic and efficient production of protein microbicides against HIV is urgently needed in resource-poor areas worldwide. In this study, the production of the novel HIV entry inhibitor candidate, griffithsin (GRFT), was investigated using Nicotiana benthamiana as the expression platform based on a non-viral vector. To increase the yield of recombinant GRFT, the RNA silencing defense mechanism of N. benthamiana was abolished by using three gene silencing suppressors. A transient expression system was used by transferring the GRFT gene, which encodes 122 amino acids, under the control of the enhanced CaMV 35S promoter. The presence of correctly assembled GRFT in transgenic leaves was confirmed using immunoglobulin-specific sandwich ELISA. The data demonstrated that the use of three gene silencing suppressors allowed the highest accumulation of GRFT, with a yield of 400 μg g−1 fresh weight, and this amount was reduced to 287 μg g−1 after purification, representing a recovery of 71.75%. The analysis also showed that the ability of GRFT expressed in N. benthamiana to bind to glycoprotein 120 is close to that of the GRFT protein purified from E. coli. Whole-cell assays using purified GRFT showed that our purified GRFT was potently active against HIV. This study provides the first high-level production of the HIV-1 entry inhibitor griffithsin with a non-viral expression system and illustrates the robustness of the co-agroinfiltration expression system improved through the use of three gene silencing suppressors." @default.
• W2796664329 created "2018-04-24" @default.
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• W2796664329 date "2018-07-01" @default.
• W2796664329 modified "2023-10-18" @default.
• W2796664329 title "Gene-silencing suppressors for high-level production of the HIV-1 entry inhibitor griffithsin in Nicotiana benthamiana" @default.
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• W2796664329 doi "https://doi.org/10.1016/j.procbio.2018.04.006" @default.
• W2796664329 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7108441" @default.
• W2796664329 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32288594" @default.
• W2796664329 hasPublicationYear "2018" @default.
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